Cassava, a starchy root vegetable native to Central and South America, has become a vital food source for millions of people around the globe. In fact, it serves as a dietary staple for more than 500 million people, especially in tropical regions such as Africa, Southeast Asia, and parts of Latin America. Countries like Nigeria, Thailand, Indonesia, and Brazil are among the top producers and consumers, where cassava plays a crucial role in food security and economic stability.

Cassava is highly valued not only for its versatility in cooking but also for its impressive nutrient profile. It is rich in vitamin C, an essential antioxidant that supports immune function and skin health, as well as copper, a mineral important for energy production and maintaining healthy blood vessels and nerves. In the kitchen, cassava is often used much like potatoes — it can be boiled, mashed, fried, or ground into flour for baking and thickening soups. Cassava flour, in particular, is popular in gluten-free diets.

However, despite its nutritional advantages, cassava carries a dangerous reputation as the “world’s deadliest food.” This stark nickname arises from the plant’s natural chemical defense system. Cassava roots contain cyanogenic glucosides, compounds that can release cyanide when the plant is improperly prepared or consumed raw. According to the World Health Organization (WHO), approximately 200 people die each year from cassava-related cyanide poisoning.

WHO explains that these cyanogenic compounds are part of cassava’s natural defense against pests and herbivores. While this adaptation helps the plant survive in the wild, it poses serious risks to human health if proper preparation steps are skipped. Inadequate processing — often a result of food shortages, conflict, or poverty — can result in dangerous levels of cyanide exposure.